JPS61222486A - Iron - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an iron used in general home appliances, and more particularly to an iron that prevents the user from forgetting to turn off the power.

BACKGROUND OF THE INVENTION A conventional iron for preventing this type of forgetting to turn off the power is disclosed in Japanese Utility Model Application Publication No. 59-37098 (hereinafter referred to as A).

P Japanese Patent Application Laid-Open No. 59-85700 (hereinafter referred to as B) has been proposed. That is, in A, ironing is a detection means for detecting an operation and a time when the operation is stopped.

The ironing device of the detecting means has a structure that includes a means for cutting off the current supply circuit to the heater after a certain period of time has passed after the ironing is stopped during operation. The operation is to automatically cut off the power to the In the embodiment, a mercury switch is used as the detection means, and the movement of mercury accompanying the ironing operation short-circuits and opens the conductive plate, thereby detecting operation and stoppage of the ironing operation. The configuration of B is basically similar to that of A, and the operation can be considered to be almost the same. In B, the detection means in A is a usage determination device. As an example of the usage determination device, a mercury switch is used as in A.

Problems to be Solved by the Invention This type of proposed iron that prevents users from forgetting to turn off the power has the following problems.

(1) Regardless of the base temperature of the iron, it will be reset to the power off state after a certain period of time.

゛Even when the base temperature is high and there is a high risk, the same time is required as when the base temperature is low, which is unfavorable from a safety standpoint.

(2) The detection means for detecting the state in which ironing is stopped generally has directionality, and if this means has directionality, the operation becomes uncertain.

Even under normal use, they often malfunction, causing inconvenience.

(3) A mercury switch that uses a large amount of mercury is a detection means that has relatively little directionality, but this poses a pollution problem.

Means for Solving the Problems The present invention includes a base equipped with a heater, a temperature detection circuit and a temperature adjustment circuit that detect the base temperature and control it to a predetermined temperature, and detect that the iron is in a self-supporting state. The self-standing leaving detection circuit recognizes that the iron has finished preheating, and if the iron is left in a state other than free-standing, the first wave OF
This configuration includes a control device that has a function of turning off the power when the heater off period tOFF (b) excluding the time F exceeds the reference value jB4 consecutively for a predetermined number of times N-) or more.

The operation will be explained using FIGS. 1 and 2. When the power plug is inserted into an outlet and the base temperature is set to a predetermined temperature, the iron starts to be energized, the heater 2 is turned on, and the base temperature is increased. The temperature detection element 6 follows the rise in base temperature, and when the base temperature Ta reaches a predetermined temperature 'rs due to the function of the temperature detection circuit 4, the heater 2 is turned off in the so-called first wave, and the control device 7 recognizes this.

After that, the heater continues 0N10FF, and the base temperature is maintained at a constant temperature. After the first wave is turned off, the operation is performed as follows based on the signal from the stand-alone left detection element 5.

(1) In the stand-alone state, the timer circuit of the control device 7 is activated, and the iron is turned off after the timer predetermined time tA (@ has elapsed).

(2) In states other than standing alone, measure the heater stop period (hereinafter referred to as tOFF) during which the heater 2 is turned off based on the signal from the temperature detection circuit B.

When this tOFFrS exceeds a preset reference value tB- for a predetermined number of times NM or more consecutively, the control device 7 turns off the power to the iron.

(3) In the state of (2) above, when tOFF4 does not exceed the reference value tB (goods) for a predetermined number of times N (Iii) or more, the heater 2 is activated by the function of the temperature detection circuit.
Continue with FF.

Here, the difference between the heater suspension period topQ>) and the power off is that in the former, the heater 2 returns to ON when the base temperature falls below a predetermined value.

The latter is a state in which the heater 2 is not turned on unless a return operation is performed manually.

Further details will be explained using FIGS. 6 to 6. In Figure 6, the iron is sometimes left unattended with the electricity turned on as shown in the figure. (B) is the P state when ironing, and leaving the item in this state is called horizontal storage.Horizontal storage is when the base is in direct contact with the floor or fabric. In this state, it is most necessary to stop the power supply to heater 2 and reset the power to OFF. (C) is the state where the stand-alone state was turned over and left on its side, and (D) is the state where the state where it was left standing was reversed. Left upside down horizontally, (The smell is left standing upside down, which is a reversal of left standing. Irons are generally not left in any other state than (A), but I didn't notice that I had accidentally pulled the power cord.) If it is, it may be left unattended even in states (B) to (E).Here, states other than independent neglect are conditions other than (A) < (B) - (odor state, or these patterns). It refers to various states such as intermediate states.

In FIG. 4, when electricity starts to be applied to the heater 2, the base temperature changes over time as shown in the figure.

■ is the start point, and ■ is the first wave OFF point. ■ is the 08 point of the second wave, ■ is the OFF point of the second wave, and ■ is the 08 point of the sixth wave. Similarly, ■, ■, and ■ are ON and OFF after the nth wave, respectively. Of these characteristics, focusing on the points pupil) and ■, FIG. 5 compares the state 7 P in FIG. 6(A) with the state in FIG. 6(B). Here, tON is the energization period of the heater, and tOFF is the heater off period as described above. In FIG. 5, (1) is in state (4), that is, in the stand-alone state, (
■) is in the state of (B), that is, when the iron is left horizontally, and (M) is when the iron is moved horizontally in the state of (B).
In other words, ironing shows the temperature characteristics of the state. t
In the ON example, the heat capacity of base 1 is dominant.

There is no big difference in any of the cases (+), (11), and (1), but the jOFF( side is the period in which the thermal energy stored in the base 1 is released, and it differs markedly depending on the heat radiation conditions.

FIG. 6 shows a quantitative result of this relationship.

Figure 6 shows t at a base temperature of 150 (t) and room temperature.
It shows the relationship between OFF number - and tOFF (@.Here, a wooden stand is used for the floor, and a cotton cloth (tenugui) is spread on the wooden stand.Q)), (R5 is the base temperature It was fixed with an auxiliary tool so that it would not be affected.As can be seen from this result, the
■ is smaller than all conditions where it is left unused, and there is also a noticeable difference in shi. For example, tOFF during the second wave is 33 (a) when moving in (B), that is, ironing, whereas it is 56 (6) when leaving in (A), that is, standing on its own, and (B) There is a significant difference from 84 (S) when left standing, that is, when left horizontally on a cotton cloth.If we focus on horizontal standing, in this case, the base surface directly contacts the horizontal surface, so t OFF depends on the object being contacted. changes.

This is shown in Figure 7. Figure 7 shows the number of tOFF times -) and tO when the base temperature is 150 (1:, ) and newspaper, wooden stand, and iron plate are selected as contact surfaces in addition to cotton cloth at room temperature.
The relationship between FF' (seconds) is calculated. As a result,
Although there are differences in tOFF (1) depending on the heat conduction characteristics of the object being touched, its value is much larger than that when ironing. Figure 8 shows the relationship between penis temperature and toF.
This is a quantitative determination of the relationship between r(fq, but tOF
Fle) changes depending on the base temperature, but there is no change in the interrelationship between laying horizontally, ironing, and standing upright.

From the above, jOFF after preheating
If you set the reference value tB4 (seconds) in advance for each base temperature scale, and turn off the power automatically when jOFF4 exceeds this tB(second), you can leave it on its own and iron it. Unsafe mode can be eliminated when the system is not in use. Here, leaving the iron on its own is a normal way to use the iron, so when leaving it on its own, it is necessary to exclude jOFF (ladles) from the above standard value tB. In order to escape.

Reliability can be improved by creating a system that resets the power when the standard value tn (how many times the ladle is exceeded).To prevent forgetting to turn off the power when left alone recognizes the stand-alone state, drives the timer circuit, and sets the timer for a predetermined time t.
A (@Automatically turn off the power after the elapsed time.

Example FIG. 9 shows a circuit configuration of an embodiment of the present invention.

In the figure, the heater 2 is a sheathed heater with a power consumption of 900 (min), and the 2-circuit symbol is R1.

Heater R, is connected to power supply 13 via contact S1. The contact S is the contact of the relay RY of the temperature control circuit 8, and the contact S1 is OFF regardless of the base temperature and the temperature is 0.
P is the state where the power is off, and the state is 0N in response to the base temperature.
10FF controls power supply to the heater R, and functions to maintain the base temperature at a predetermined temperature.

F is a temperature fuse. 9 is the DC power supply circuit.

This is a circuit that rectifies 1[]0 (V) of the power supply 16 and divides it into one voltage.

This circuit has a ground terminal and terminals at positive potentials v and v2. V, , is 24M to operate the DC relay.
.

v2 is set to 5 (to) in order to operate other electronic circuits. The control device 7 is an LSI chip, and in this embodiment, a CMOS one-chip microcomputer is used. VDD is the power supply terminal, V ss, CNV
sS is the ground terminal, REsET is the reset input terminal,
X0UT.

XIN is a clock input terminal and r Do-D7. F
OxF3°S is a port terminal for input/output with an external circuit.

An oscillation circuit 12 composed of a ceramic resonator, a resistor, etc. is connected to X0UT and XIN, and a 400 KHz clock input is input thereto. D1 to D7 are connected to a DA conversion circuit. S is the input port terminal of the temperature detection circuit 4, and Fo is the independent left detection circuit 6. Fl is an input port terminal of the temperature setting circuit 11. Also, F3 has a temperature of 11
P is the output port terminal of the adjustment circuit. Then, the program memory (ROM) is stored in the flowchart shown in FIG. A function is input to turn off each power supply after the heater off period tOFF exceeds the reference value tBl by a predetermined number of times N or more. A negative characteristic thermistor TH is used as the temperature detection element 3, and a comparison circuit with rc1' as a comparator is configured in the temperature detection circuit 4. The DA conversion circuit 10 is part of the temperature detection circuit 40 circuit configuration. The input terminal side of the IC has resistors R6, R7, and R8 in addition to the thermistor TH, and the output terminal side has a resistor R9zR+oe. Also, the input terminal side is equipped with two resistors and capacitors for noise removal. A photo ink converter is used as the independent left detection element in No. 5. The circuit components of the photointerrupter include a light emitting element LED and a phototransistor Q2.

R11 is a current limiting resistor for the LED, and R12 is a load resistor for Q2. The independent detection circuit of B is IC2, its input side resistance RI31, RI4 and output side resistance RI5r.
It is composed of R16 etc. The temperature control circuit 8 is composed of a transistor Q+, a relay RY serving as a load for Ql, and resistors R2 and R3 of the base circuit of Ql. D is a diode for absorbing the back electromotive force applied to the RY coil. The F3 port terminal of the LSI chip is Q.
] drive terminal, Ql is OFF when F3 is H
, L, Ql is turned ON. Temperature setting circuit 11 is F when switch S2 is ON, T to the port terminal, and OFF.
At this time, the H signal is manually input. S2 is a self-reset type switch that turns ON when pressed with one hand and turns OFF when one hand is released.
This is F. No. 10A shows the structure of the independent sensing element 5. 14 is a casing with a built-in LED and Qz' (C), and 15 is a groove for guiding an obstacle 16.

The obstacle 16 is a spherical object that does not allow light to pass through. Groove 15 has a light sound emitted by an LED)) Runsister Q
It has a hole 17 that reaches 2.

As shown in FIG. 11(a), when the device is left standing, the hole 17 is blocked by the obstacle 16, and the LED light does not reach Q2, so Q2 is turned off. In addition, in a state other than the self-3P vertical device, as shown in FIG. 11(b), the obstacle moves within the groove 15, the hole 17 opens, and the LE
Light from D reaches Q2 and turns +Q2 ON. here,
As shown in Fig. 11(a), the groove 15 is arranged so as to be inclined with respect to the vertical direction when the stand-alone condition is left standing. This is so that they can respond to the situation.

The operation of the embodiment having the above configuration will be explained.

(1) Insert the iron's power plug into the outlet.

The LSI chip of the control device 7 is turned on, but the heater 2
The device is in a power-off state where no power is applied. The F3 port terminal is H, Ql is OFF, and s is OFF.

(21 Set the base temperature to a predetermined temperature.

If you press S2 a predetermined number of times or keep pressing it for a predetermined time, the port terminals go to L one by one from D7 to L, and finally to L.
The position where it becomes becomes the position of the set temperature scale. For example, D
When 3 finally becomes L, if the resistance of the DA converter circuit 4P connected to D3 is 1RD3, the resistance value at the position of the set temperature scale is RD3 and the resistance value of the parallel circuit RD311R6. It will be decided. RDa is on the inverting input side of the IC.
11 RD31 where v2 is divided by the resistance value of R6 and TH
1 The voltage on the R6 side is applied.

Further, a reference voltage determined by R7 and R8 is input to the non-inverting input side of the ICI.

(3) The heater 2 starts to be energized and enters a preheating state.

Immediately after preheating starts, the base temperature does not reach the specified temperature.
The resistance value of TH is high<, and the output side of I- is H. Therefore, an H signal is input to the S port terminal.

(4) The base temperature reaches the predetermined temperature and preheating ends.

The resistance value of TH becomes low, and the output side of +'rc becomes L. Therefore, an L signal is added to the S port terminal and +F
3 boat terminal becomes H, Ql turns OFF L, RY operates and contact S1 turns OFF.

And the base temperature is maintained in a constant temperature range at 15P. Ru.

(5) Start ironing.

The TH follows changes in the base temperature, and the base temperature is maintained within a constant temperature range. During this time, the tOF'F(side) does not exceed the reference value tB4, and ironing can be continued.

(6) If the iron is left standing on its own after preheating, the power will be turned off after the timer predetermined time tA(+).

If you leave the iron on its own after preheating.

The independent left detection element 5 is in the state shown in FIG. 11(a).

Q2 is OFF and the output terminal side of IC2 remains at H level. Then, the H signal is still applied to the Fo port terminal, and the timer circuit built in the LSI chip changes the F3 port terminal to H after the one-person system, thereby turning off the power. Then, unless there is an input to s2, that is, an input to the F1 port terminal, the heater 2 will not be energized. Here, tA is approximately 10 (@).

(7) If the heater is left in a state other than independent, and the heater's off period tOFF (- exceeds the reference value TH side N (-) continuously, the power will be turned off.

If the device is left in a state other than freestanding after preheating, the freestanding detection element 5 will be in the state shown in FIG. 11(b). At this time, Q2 becomes ON and the output terminal side of IC2 becomes L. Then, an L signal is manually input to the Fo boat terminal.

When an L signal is input to the Fo boat terminal, the LSI
Chip data memo 9 (RAM) is t OFF
time is recorded and the program memory (RO
tO
FF ■) 2 tB (When the paulownia continues for more than N 2, the F3 port terminal is set to H, the built-in circuit r is activated, and the power is turned off. Here, tB (+=+) is the base temperature 150c Terror 0 (
e), N = 3-). Moreover, the tBi side is changed according to FIG. 8 for each scale of the base temperature.

Effect of the invention According to the present invention, the following effects are achieved.

(1) Heater stop period j; 0FFi standard value tB
Compared to the above, since it continues for at least N times, reliability is improved on average even if there is foreign noise, etc., and the unsafe mode associated with 7Ps when left unattended can be reliably eliminated, and highly safe icons can be provided.

(2) If the device is left in a state other than leaving it standing alone, which is dangerous, unlike the conventional timer operation method, the power will be turned off in a short period of time if the predetermined temperature is high, and in a long period of time if it is not. It is possible to create a reliable and highly safe system.

(3) The stand-alone left detection element only needs to respond to the stand-alone left state, and it is possible to use a directional element.
Non-polluting items such as mercury switches can be used.

Note that in the present invention, tOFF mainly changes depending on the usage condition of the iron, and since jON is almost constant, tO
I have explained it with FFK M in mind, but the heater's 0N10
Even if it is taken as a change in the FF cycle (tON+tOFF) (8+) or the energization rate (toN/1OFF +tON), it is still essentially a change in tOFF and is included in the content of the present invention. .

[Brief explanation of the drawing]

8P Fig. 1 is a block diagram of a system related to an iron according to an embodiment of the present invention, Fig. 2 is a flowchart of the same program, Fig. 3 is an explanatory diagram of various states of leaving the iron, and Fig. 4 is the base of the iron. A temperature characteristic diagram showing changes in temperature. Figure 5 is an explanatory diagram that focuses on ■, ■, and ■ in Figure 4, and shows that the temperature characteristics change depending on the conditions under which the iron is left. Figure 6 is an explanatory diagram showing the temperature characteristics of the same iron. An explanatory diagram of the relationship between tOFF (side and the number of times) at each position of The characteristic diagram shown in FIG. 9 is a schematic diagram of the same circuit, and FIG.
FIG. 1(a), Φ) is an explanatory diagram showing the positional relationship in a state where the self-standing leaving detection element is installed and housed in the iron. 1...Pace, 2...Heater. 4...Temperature detection circuit, 6...Self-standing neglect detection circuit. 7...Control device, 8...Temperature control circuit. Applicant: Tol Ritsuneki Co., Ltd. *Eγ-1~ ← - Frontage (throat) 1io7←--

Claims (1)

[Claims] A base (1) equipped with a heater (2), a temperature detection circuit (4) and a temperature control circuit (8) that detect the base temperature and control it to a predetermined temperature, and a stand-alone stand-alone detection circuit that detects whether the iron is left stand-alone. Circuit (6): When the iron is in a state other than standing alone after preheating, the change in the heater off period tOFF (seconds), excluding the first wave OFF, is measured, and this changes the reference value tB (seconds) a predetermined number of times. An iron characterized in that it is equipped with a control device (7) having a function of turning off the power when the number of times exceeds N (times) or more in a row.